Apparatus for cooling fuel-valves for internal combustion engines



July 18, 1939. 2,166,331

-VALVES FOR INTERNAL COMBUSTION ENGINES E. WAEBER.

APPARATUS FOR COOLING FUEL Filed Jan. 15, 1937 INVENTOR Erwm BY W616 56/ m Dwmh Mm ram ATTORNEYS Patented July 18, 1939 PATENT OFFICE APPARATUS FOR COOLING FUEL-VALVES FOR COMBUSTION ENGINES Erwin Waeber. Scrunch, Switzerland, assignor to Sulser mm, Bocit Switzerland Anonynie, Wintcrthur,

Application January 15. 1937, Serial No. 120.68!

In Switzerland July 2'1, 1936 6 Claims: (01. 123-177) This invention relates to internal combustion engines of the type in which fuel is injected into 7 the engine cylinder by means of a fuel-valve and has for its object the provision of means for cooling the fuel-valve. It is anobject of the invention to provide means for circulating the cooling medium used in cooling the engine cylinders-in contact with the incl-valve. I The apparatus of the invention comprises a cylinder liner and a cylinder jacket which form a cylinder-cooling space for the circulation 'of a cylinder cooling medium, one or more fuel-valves projecting through the liner and the jacket, adapted to inject fuel into the cylinder and a duct or passageway in contact with the fuel-valve for the circulation of the cooling medium therethrough. Itis a particular obiect of the invention to; provide partition means. in association with the liner and Jacket-for controlling the passage of the cooling medium from the cylinder! cooling space through the duct or passageway. In engines having a cylinder head, the cooling inedium is passed from the cylinder-cooling space through the fuel-valve duct and then into a space or chamber for cooling the cylinder head. In engines of the opposed-piston type, the cylindercooling space is divided by suitable walls adjacent the fuel-valves, and the cooling medium is forced to pass from one side of the walls to the other through the duct or passageway in contact with the fuel-valve.

The invention will be better understood from the following description taken in conjunction with the accompanying drawing, in which:

Fig. 1 is a fragmentary view, with parts shown in section, of one form of apparatus in accordance with the invention;

Fig. 2 is a cross-sectional view of a working cylinder illustrating another form of apparatus-in accordance with the invention;

Fig. 3 is a view, partly in section, taken along the line 3-4 of Fig. 2, and

Fig. 4 is a development of a section taken substantially along line 4-4 of Fig. 3.

That modification of apparatus in accordance with the invention illustrated in Fig. 1. is especially adapted to internal combustion engines having a cooled cylinder head. The-apparatus comprises a piston i, a cylinder in, a cylinder liner 2, a Jacket 3, and a cylinder-cooling space 4 for the circulation of a cylinder cooling medium. for example, water. The cylinder head 5 has a chamber 9 therein for the circulation of a cooling medium and is mounted upon the cylinder in any suitable manner. The under portion of the cylinder head preferably comprises a base I which serves as a partition or wall separating the cooling space of the cylinder in from the chamber in the cylinder head.

The fuel-valve 8 of the injection type is appro- 5 priately mounted adjacent the union of the cylinder head and liner, and comprises a surrounding duct or passageway 9, which communicates with passageway i0 leading into the cylinder-cooling space 4 and with a passageway I ileading into the 10 chamber i in the cylinder head 5. The apparatus illustrated in Fig. 1 is so constructed and arranged that the cooling medium cannot be passed from the cylinder-cooling space 4 .to the cylinder head chamber 6 without passing through the duct 9. In other words the only passageway for the flow of the liquid-cooling medium from space 4 to the chamber 8 is as indicated by the arrows, through passageways il, 9 and ii.

The apparatus illustrated in Figs. 2, 3 and 4 2 comprises a cylinder i4, a cylinder liner l5 and opposed-pistons i6 and II which are preferably arranged in a horizontal position and, as shown, are in their dead center positions. A'cylinder jacket I! is mounted in spaced relation ,to the 25 liner ll thereby forming cylinder-cooling spaces I9 and 20 which are separated from each other bythe transverse walls 2i and 22. The transverse walls 2i and 22 have openings 22 and 24, respectively (Figs; 2 and 4), for the passage of the cool- 3 ing medium. An intermediate transverse wall 29 is located equi-distant from the piston ends and has two diametrically opposite openings 26. In an especially advantageous construction, each fuel-valve 21 has a rolled sleeve 29 vmounted thereover and a valve-Jacket 29 fitted iover the V sleeve. The jacket has a surrounding recess which is walled '01! from the fuel-valve by the sleeve, thereby forming a surrounding duct or passageway 29 for the circulation of a cooling medium to 40 cool the valve. The assembly of elements comprising the fuel-valves 21, the sleeve 28 and the jacket 29 is inserted through suitable openingsin the cylinder wall and jacket and closely fitted into the openings 26. Valve-jacket 29 has diametrically opposite openings Ii'and 32 therein which open a communicating pasageway from the cylinder-cooling space i9 through the duct 30 and into the cylinder-cooling space 20. In this construction of apparatus the cooling medium flows as indicated by the arrows from the cylinder-cooling space l9 through the opening 23, between walls 2| and 25, through opening 3!, around the fuel-valve in the duct 39.0ut the opening 22, into the space between walls 22 and be employed for this purpose.

'I'he'apparatus of the invention enables the fuel--valve cooling to be controlled in a very simple manner by controlling the cylinder cooling. Apparatus in accordance. with theinvention is especially advantageous in multi-cylinder engines of the opposed-piston type in which the 'i'uelvvalve must be arranged in the middle oi. the

cylinder jackets, in the plane of the cylinder axis, that is, at the narrowest place between the working cylinders.

I claim:

1. Internal combustion engine apparatus comprising a cylinder liner, a cylinder jacket, said liner and jacket being mounted in spaced relation thereby forming a cylinder-cooling space for a cooling medium, an injection fuel-valve operatively associated therewith, a ductior the" circulation therein of a cooling medium embrace ing the exterior part 01' the valve, a cylinder head having a chamber therein 'i'or'the circulati on' of a cooling medium and means forpassing the cooling medium from the cylinder-cooling space through the duct and into the chamber.

2. Internal combustion engine apparatus comprising two opposed-pistons in a cylinder, acylinder liner, a cylinder jacket, a plurality of transverse walls between the liner and jacket dividing the space between the liner-and Jacket into ,two separate cylinder-cooling spaces one adjacent each of the pistons, a fuel valve mounted in an opening in the liner and jacket and between the walls, said valve having a duct in its exterior portion, and meansior passing a cooling medium from one of the cylinder-cooling the duct and into the other cooling space.

3. A combination with an internal combustion engine of the fuel injection type comprising a cylinder, a cylinder liner, a cylinder Jacket, at least two cooling spaces in heat exchanging contact with the cylinder, a wall in engagement with the liner and the jacket separating the two coolin: spaces, a fuel valve adapted to inject fuel into the engine inserted through the liner and adjacent the two cooling spaces, said valve being provided with a duct in its exterior portion in which a cooling medium may be circulated, and

conduit means for passing the cooling medium from one cooling space through the duct to the other cooling space.

4. In internal combustion engine apparatus having a cylinder, at least two cooling spaces in heat-exchange contact with the cylinder and an injection fuel-valve located at approximately the 'iunctionpoint of said spaces, and having aduct in the exterior portion of said fuel-valve for the circulation of a cooling-medium, a passageway connecting said duct with each of said cooling spaces respectively for passing all of the cooling medium from one space through the duct to the other space.

5. An internal combustion engine 01' the opposed-piston type comprising a cylinder liner, a jacket .mounted in spaced relation over the liner, wall means between the liner and the jacket dividing the space between the liner and the jacket ,into two cylinder-cooling spaces, a fuelvalve' projecting through the liner at approxi mate ly the junction point of said cooling spaces and midway between the dead-end positions of the pistons, said fuel-valve having a duct in its exteriorwall, and a passageway connecting each cooling-space with the duct, whereby the cooling medium for cooling the liner may be circulated from one cooling-space to the other through the duct I 6. Apparatus according to claim 5 in which the wall means comprises two walls spaced apart, each wall having at least one hole therein, and an intermediate wall between the said two walls, said intermediate wall having an opening therein in which the fuel-valve is mounted.

' ERW'IN WAEBER. 

